RealisticSpace: The Closest Ones v4.16+

This pack contains 8 accurate, high definition skyboxes of real galaxies, but if you don't like real galaxies color, you can change it inside of instance material.

There's only one blueprint for all the skyboxes, you simple change the material of skydome in BP_Skybox.

This pack contains the following skyboxes:

Andromeda Galaxy
Milky Way Galaxy
Black Eye Galaxy
IC 10 Galaxy
Leo A Galaxy
NGC 253 Galaxy
NGC 604 Nebula from Triangulum Galaxy
Whirlpool Galaxy

Features:

Adjustable brightness and color grading of skyboxes
Simple setup